HTTP headers

This tool will help you see that a URL returns correct headers for example when validating post URLs, 301s, or content security policies.

Click here to test it with an example! Can you spot a custom header? I added it to the site a long time ago. Hopefully it's still there.

Enter a URL

Headers send from https://hifk.fi

HTTP/1.1 200 OK
Connection: close
Content-Type: text/html; charset=UTF-8
HIFK-FANS: Toinen puoli huutakaa meille!
Link: ; rel="https://api.w.org/"
Link: ; rel="alternate"; title="JSON"; type="application/json"
Link: ; rel=shortlink
set-cookie: playoffs_banner=true; expires=Sat, 06-Sep-2025 21:31:02 GMT; Max-Age=604800; path=/; secure
X-LiteSpeed-Cache-Control: public,max-age=604800
X-LiteSpeed-Tag: 5f7_front,5f7_URL.6666cd76f96956469e7be39d750cc7d9,5f7_F,5f7_Po.203,5f7_PGS,5f7_
Etag: "126292-1756589462;;;"
X-Litespeed-Cache: miss
Transfer-Encoding: chunked
Date: Sat, 30 Aug 2025 21:31:02 GMT
Server: LiteSpeed
Strict-Transport-Security: max-age=31536000


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